TouchArcade reports that Nintendo DS emulator nds4ios is currently available to download on iOS 8.4 devices. If you want to download the app, just visit iEmulators.com from your mobile device, click the apps tab, scroll down to nds4ios, tap it and then click Install at the bottom of the window.

Unlike in previous emulators, you can’t add ROMs directly from the app. Instead, you’ll need to sync nds4ios up with your Dropbox account if you want to play backed-up Nintendo DS ROMS on your phone or tablet.

It’s worth keeping in mind that you are allowing an app that wasn’t made available on the App Store access to your device, so the extra-cautious among you might want to avoid emulators altogether. The app could also lose its signature at any time, so don’t dawdle if you are willing to take the risk. These apps are known to vanish for months at a time.

It’s not quite first-party Nintendo games on mobile, but for those of you with backed-up copies of your favorite DS titles, it’s a way to bring Nintendo games on the go in an even more portable fashion.